Description
Brown HT (C.I. 20285) is an extra pure synthetic dye with CAS number 4553-89-3 and empirical formula C₂₇H₁₈N₄O₉S₂Na₂. The molar mass is 652,57 g/mol, density 0,632 g/cm³ and flash point 182 °C, providing useful physical data for handling and formulation work. The colourant, from manufacturer Carl ROTH, is further identified by EG nr. 224-924-0, supporting traceable use in regulated laboratory environments. Extra pure grade designation indicates suitability where defined dye identity and reduced impurity load are preferred. Research and quality-control laboratories apply Brown HT in colourimetric studies, reference mixtures and specialty staining protocols. The disodium azo structure and Colour Index reference aid correct selection against related brown dyes. Glass packaging protects the solid during storage and allows convenient weighing for stock solutions. Clear CAS, formula and molar-mass data streamline documentation and method transfer between sites.
This article is part of Organic building blocks & synthesis reagents, in Organic chemicals & synthesis reagents.
Key features
- Appearance: red to brown powder
- Loss on drying (135 °C): ≤30 %
- CAS number: 4553-89-3
- Pack sizes: 10 g, 25 g, 100 g
- EG nr.: 224-924-0
- Empirical formula: C₂₇H₁₈N₄O₉S₂Na₂
- Molar mass: 652,57 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Brown HT (C.I. 20285), extra pure, 10 g, glass
What is this article?
Brown HT (C.I. 20285), extra pure, 10 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Organic building blocks & synthesis reagents, inside Organic chemicals & synthesis reagents, in Lab chemicals.
A building block is an organic molecule bought to become part of a larger one. The structure, the CAS number and the purity decide it. A 95 percent reagent and a 99.9 percent reagent of the same name leave different impurities in the product. The functional groups are the reason it was chosen.
An organic chemical is built on carbon. In this category it is a building block or a reagent for making another molecule: a starting material, a coupling agent, a polymer, a PEG. Purity is a specification of which impurities remain. The structure, the CAS number and the grade decide whether two bottles are the same substance. Structures and properties are on PubChem. Nomenclature is IUPAC. Classification follows ECHA and the CLP Regulation.
Which category should I open next?
The category is Organic chemicals & synthesis reagents. The sub-category is Organic building blocks & synthesis reagents. The catalogue is Lab chemicals.
Shelves beside this one are Polymers, PEGs & silicones and Click chemistry, bioconjugation & synthesis reagents.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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